feeding regime for rbta?

[ahullsb]

I just bought a rbta and it's about the size of a softball when open. I'd like it to feed it more often to encourage as much growth as possible to host fairly large clowns. How often can I feed it and what is the best food for them? I have just been using mysis, formula 1 (red cubes cut up) and drop zooplankton into the tank every few days. Any suggestions would be greatly appreciated.